No Logon Servers available

Hello,

I am using a Windows 2012 R2 Standard DC's with Windows 10 client machines in a local domain.

Just recently moved to a new office and this is the first time (since the move) I am trying to join a new client machine to my local domain and also add a new domain user profile locally to a client machine and getting these errors:

There are currently no logon servers available to service the logon request.

or...

this PC is having problems communicating with this domain.

• same errors occur from different client machines
• clients & servers are on the same local network
• Ping & access to network shares are successful
• NETLOGON, DFS Replication & SYSVOL are all up and running
• Restarted DC's
• DC is recognized by the client as a DNS server

Any helpful resolutions would be appreciated.

Thanks